Paper-holding clamp.



H.-E. LEININGER. PAPER HOLDING CLAMP. APPLICATION men FEB. 7, 1916.

Patented Mar. 13, 1917.

tic.

HARRY E.LEI1\TI1\TGER, or CHICAGO, ILLINOIS.

To all whom it may concern Be it known that I, HARRY E. LEININGER, a citizen of the United States, residing at Chicago, Illinois, have invented certain new and useful ln'iprovements in Paper-Holding Clamps, of which the following is a specification. n

The essential object of this invention is to provide a clamping device for securing papers upon a holder or back. The back shown in the drawings is an ordinary board or other hard, fiat body which affords a writing-surface, and the sheets of paper are adapted to be clamped in place upon said board by use of the 'hereinafter-described invention. The use of said-board is merely illustrative, however, and other forms of backs orwriting-surfaces may be employed. Racks and boards equipped with attach ments for clamping or holding papers upon a writing-surface are old .in the art and many varieties thereof are and have been stable articles of commerce for many years, and no invention broadly isclaimed for the combination of a writing-surface and a springcontrolled or other device for clampmg papers thereupon, but the invention does.

reside in the particular form of paperclamping attachment shown in the drawings and described in the specification.

In the drawings, in which like numbers of reference represent like parts wherever they occur, Figure 1' is a perspective view of a board or base provided with a paper-holding clamp; Fig. 2 is a view of-the clamping attachment, the board or base being removed; Fig. 3 is a detail of one of the clamping-arms; Fig. 4 is a detail of the other clamping-arm; Fig. 5. is a View at right angles to Fig. 2, looking downwardly from above in said Fig. 2; Fig. 6 is a detail taken on the line 66, Fig. 5, being upon an enlarged scale as compared with Fig. 5; Fig. 7 is a top plan view of a modified form of the invention; and Fig. 8 is a view at right angles to Fig. 7.

The board or base 1, which may be made of wood or any other suitable material hard and firm enough to provide a writing-surface, may be made of any desired size or shape. At or adjacent one end, the base 1 is provided with a countersunk portion or cavity, within which cavity 2 some of the movable parts are adapted to be received. The sheet or sheets of paper 3 to be clasped or clamped upon the base 1 are directly en- Specification of Letters Patent.

PAPER-HOLDING CLAMP.

Application filed February 7, 1916. Serial N 0. 76,555.

gage d by the clamping-arms 4 and 5, which said clamping-arms 4t and 5- are either V- shaped or arcuate in cross-section, as best indicated in Figs. 2, 3, and 4 of the drawings. The clamping-arm 4 is secured to or integrally united with the swinging plate 6, while the clamping-arm 5 is similarly joined to the swinging plate 7. Plate 6 is provided with a perforation '8 through which the pintle or shaft 9 passes, the plate being freely revoluble around said pintle 9. Plate 7 is provided with a perforation 10 which is non-circular in shape and which fits over one part of the shaft 9, said shaft 9 at or near the point where it is engaged by plate 7, being shaped to correspond with the shape of the perforation 10. The shaft 9 and plate 7 may, however, be secured together in any manner to cause the plate 7 and the shaft 9 to rotate in unison.

One end of the shaft 9 is journaled inthe ear or lug 11, the opposite end being secured to the flange '12, said flange 12 and said ear 11 being disposed in substantially parallel planes. A; bed-plate 13 is provided, same being normally at right-angles to the members 11 and 12, all of said members 11, 12, and 13 being preferably united integrally together and being ordinarily made by stamping all of said parts from a single piece of sheet-metal, The ear or lug 11 depends from the bed-plate 13, as best shown at the bottom of Fig. 5' and at thefront of Fig. 2, and the flange 12 similarly depends from the bed-plate 13, being connected therewith by narrow ribbons or webs 14, as

best shown in Fig. 1.- Part of the metal is removed at 15, thereby supplying a slot in the metal stampingadapted to register with the countersunk recess 2 in the base 1, thus permitting the plates 6 and '7 to revolve upon or about pintle 9 as an axis. 7

The pintle 9 is encircled by a helical spring 16, one end 17 of which passes through and is received Within a perforation 17 in the pintle 9. The other end of the helical spring 16 is bent to form an outwardly-extending arm 18 carrying a hook-like end 19, which hook-like end fits over the plate 6. If the plate 6, therefore, be rotated in a clockwise direction, Fig. 3, or in the counterclockwise direction, Fig. 2, the coil part of the spring 16 will tighten as the hook-like end be elevated and said spring will nor mally act to return the plate 6 to normal or starting position indicated in Fig. 2, and

' Fig. 2, or counter-clockwise direction, Fig. 4:,

the shaft 9 is thus caused to revolve, thereby tightening the helical spring, 16, which spring, accordingly, tends to keep the plate 7 and arm 5 in the position depicted in Fig.

2. The base or board 1 is preferably recessed at 20 so as to permit the bed-plate 13 to be flush with the surface of the board and thus afford a practically unbroken-writing surface. When it desired to move the sheets of paper from the board or to insert new sheets, the operator will grasp the clamping-arms 4 and 5 with his fingers, elevate said arms, which move, of course, against the resistance of the spring, and thereafter permit said clamping arms to return under the action of the spring to normal or starting position, in which position the clamping-arms i and 5 will engage the paper and hold same in place. Said clamping-arms 4 and 5 are preferably made arcuate or substantially arcuate in cross-section in order to present a curved edge to the sheet or sheets of paper, thus enabling the device to accommodate itself to piles of paper of any thickness without presenting a sharp or cutting edge to the paper as would be done should the clamping-arms t and 5 be made flat with squared or sharp edges.

In the modification shown in Figs. 7 and 8, the metal stamping which supports the pintle 9 is omitted for convenience, although it will be obvious that some suitable support for pintle 9 must be provided. Upon the pintle 9 is a boss 21 which is provided with an annular groove 22, and in said groove 22 are received the coils of the spring 23, which groove, accordingly, serves to prevent slips ping or displacement of the spring. The

ends 24: and 25 of the spring 23 are bent into hook-like form and said ends project through suitable perforations in the plates 26 and 27 Both of the plates 26 and27 are freely revoluble upon the pintle 9, and the spring 23 will normally actuate the plate 7 in a clockwise direction (Fig. 8) thus keeping the clamping-arms 4 and 5 normally ing a bed-plate,

pressed into engagement with the writing surface.

I claim as my invention:

1. A means for clamping papers comprisa flange and an ear on opposite sides of said bed-plate and disposed at an angle thereto, a shaft extending from said flange to said ear and being revolubly received by the same, a pair of plates received upon said shaft, a clamping-arm projecting outwardly from each of said plates, and a spring cooperating with said shaft and with each of said revoluble plates and adapted to actuate said plates.

2. A means for clamping papers comprising a bed-plate, a flange and an ear on opposite sides of said bed-plate and disposed at an angle thereto, a shaft extending from said'flange to said ear and being revolubly received by the same, a pair of plates received upon said shaft, a clamping-arm pro-. jecting outwardly from each of said plates, and a spring coiiperating with said shaft and with each of said revoluble plates and adapted to actuate said plates, said bed-plate being provided with a slot or perforation through which said revoluble plates are adapted to more.

' A means for clamping papers comprising a pair of revoluble plates, a shaft about which same are adapted to revolve, a clamp ing-arm extending outwardly from each of 5 members, a shaft in connection with which both of said members are adapted to revolve, a clamping-arm projecting from each of said members, and means adapted to actuate said members thereby to keep said clamping arms normally in engagement with said writing-surface.

6. A means for clamping papers comprising a writing-surface, a pair of revoluble members, a shaft in connection with which both of said members are adapted to revolve, a clampingarm projecting from each of said members, and means adapted to actuate said members thereby to keep said clampingarms normally in engagement With said writing-surface, said clamping-arm being provided with curved surfaces upon the sides thereof which engage said writingsurface. I

7. A means for clamping papers comprising a writing-surface, a pair of independently-actuatable plates which carry a clamping-arm, said clamping-arms being substantiall y parallel to said writing-surface, said plates being revoluble around a common axis, and spring-like means adapted to actuate said plates thereby to force said clamping-arms into engagement with said writing surface.

8. A means for clamping papers comprising a writing-surface, a pair of independently-actuatable plates which carry a clamping-arm, said clamping-arms being substantially parallel to sald wrlting-surface, said plates bemg revolu'ble around a common axis, a spring connected With both of said revoluble plates and adapted to actuate each of same, thereby to force said clamping.- arms into engagement With said Writingsurface.

9. A means for clamping papers comprising a Writing-surface, a pair of independently-actuatable plates which carry a clamping arm, said clamping-arms being substantially parallel to said Writing-surface, said plates being revoluble around a common axis, and spring-like means adapted to actuate said plates thereby to force said cla1nping-arms into engagement with said Writingsurface, said clamping-arms being provided Copies of this patent may be obtained for With curvedsurfaces upon the sides thereof HARRY E. LEININGER.

five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

